Development and Application of Low Temperature Electroplated Diamond Petroleum Bits

This bit is used for coring in hard rocks.Previously, the bits used for coring in Henan oilfield are column PDC or triangle PDC bits and conventionally heat impregmented diamond bits, which are low in coring efficiency and drilling speed and high in cost.While the average drilling speed has increased from 4.20 m to 7.62 m in one drilling and the average coring rotation has increased from 0.21 m per hour to 0.84 m per hour when the low temperature eltectroplated diamond bits have been used in recent two years. The manufacturing technique of this kind of diamond bits with the temperature changed from over 1 000 ℃ in the conventional one to the constant room temperature has greatly prevented the bits from heat damage and enhanced the coring rotation speed with the use of large grained diamonds with high strength.